1 files changed, 16 insertions, 0 deletions
diff --git a/test/files/neg/unchecked-impossible.scala b/test/files/neg/unchecked-impossible.scala
new file mode 100644
index 0000000000..985a2d0b08
--- /dev/null
+++ b/test/files/neg/unchecked-impossible.scala
@@ -0,0 +1,16 @@
+final case class T2[+A, +B](a: A, b: B)
+
+class A {
+  def f1 = T2(1, 2) match {
+    case Seq(x) =>
+    case _      =>
+  }
+  def f2 = T2(1, 2) match {
+    case _: T2[Int, Int] => /* nowarn */
+    case _               =>
+  }
+  def f3 = T2(1, 2) match {
+    case _: T2[_, Int] => /* nowarn */
+    case _             =>
+  }
+}